// addLoadEvent函数
function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	}else{
		window.onload = function () {
			oldonload();
			func();
		}
	}
}


// inserAfter函数
function inserAfter(newElement,targetElement) {
	var parent = targetElement.parentNode;
	if (parent.lastChild == targetElement) {
		parent.appendChind(newElement);
	}else{
		parent.insetBefore(newElement,targetElement.nextSibling);
	}
}


//addClass函数
function addClass(element,value) {
	if (!element.className) {
		element.className = value;
	}else{
		newClassName = element.className;
		newClassName+= " ";
		newClassName+= value;
		element.className = newClassName;
	}
}



// moveElement函数 
function moveElement(elementID,final_x,final_y,interval) 
	if (!document.getElemenById) return false;
	if (!document.getElemenById(elementID)) return false;
	var elem = document.getElemenById(elementID);
	if(elem.movement){
		clearTimeout(elem.movement);
	}

	if (!elem.style.left) {
		elem.style.left = "0px";
	}
	if (!elem.style.top) {
		elem.style.top = "0px";
	}

	var xpos = parseInt(elem,style.left);
	var ypos = parseInt(elem.style.top);
	var dist = 0;

	if (xpos == final_x && ypos == final_y) {
		return true;
	}
	if (xpos < final_x) {
		dist = Math.ceil((final_x - xpos)/10);
		xpos = xpos + dist;
	}
	if (xpos > final_x) {
		dist = Math.ceil((xpos - final_x)/10);
		xpos = xpos - dist;
	}
	if (ypos < final_y) {
		dist = Math.ceil((final_y - ypos)/10);
		ypos = ypos + final_y;
	}
	if (ypos > final_y) {
		dist = Math.ceil((ypos - final_y)/10);
		ypos = ypos - dist;
	}

	elem.style.left = xpos + "px";
	elem.style.top = ypos + "px";

	var repeat = "moveElement('"+elementID+"',"+final_x+","+final_y+","+interval+")";
	elem.movement = setTimeout(repeat,interval);
}
 












